Why does the internet disconnect after 5 minutes Xubuntu 16.04?

Question

linux

After turning on the computer after five minutes, the Internet turns off, here are the logs , what could be the problem?

Answer 1

Okay, assumptions on dns cut off, through Google and the problem is voiced here: https://roheve.wordpress.com/2014/12/12/ubuntu-kee... , as well as the solution of onnoy.